Chemistry help - molecules and particlesWatch
- Study Helper
Hi, Im currently revising GCSE Chemistry and I've noticed that, when describing reactions, sometimes we use the word "molecule" whereas sometimes we call them "particles", eg CO2 is a molecule but Fe2O3 is a particle. What is the difference between them and when do we use one as opposed to the other?
A particle is just a name given to something very small to be used in a model. Chemically, it's not a particularly brilliant word to use but it's used a lot in things like kinetic theory to describe the motion of gasses, etc. A particle could in theory be anything as long as it's made of discrete bits.
In general, I wouldn't use the world particle unless the actual nature of those particles is less important, for instance in kinetic theory.